What's the most efficient test of whether a PHP string ends with another string?

Question

The standard PHP way to test whether a string $str ends with a substring $test is:

$endsWith = substr( $str, -strlen( $test ) ) ==          


        

Answer 1

Here’s a simple way to check whether one string ends with another, by giving strpos an offset right where the string should be found:

function stringEndsWith($whole, $end)
{
    return (strpos($whole, $end, strlen($whole) - strlen($end)) !== false);
}

Straightforward, and I think this’ll work in PHP 4.

Answer 2

In PHP 8:

str_ends_with('haystack', 'stack'); // true
str_ends_with('haystack', 'K'); // false

and also:

str_starts_with('haystack', 'hay'); // true

PHP RFC: Add str_starts_with(), str_ends_with() and related functions

Answer 3

I'm thinking the reverse functions like strrchr() would help you match the end of the string the fastest.

Answer 4

What Assaf said is correct. There is a built in function in PHP to do exactly that.

substr_compare($str, $test, strlen($str)-strlen($test), strlen($test)) === 0;

If $test is longer than $str PHP will give a warning, so you need to check for that first.

function endswith($string, $test) {
    $strlen = strlen($string);
    $testlen = strlen($test);
    if ($testlen > $strlen) return false;
    return substr_compare($string, $test, $strlen - $testlen, $testlen) === 0;
}

Answer 5

I hope that the below answer may be efficient and also simple:

$content = "The main string to search";
$search = "search";
//For compare the begining string with case insensitive. 
if(stripos($content, $search) === 0) echo 'Yes';
else echo 'No';

//For compare the begining string with case sensitive. 
if(strpos($content, $search) === 0) echo 'Yes';
else echo 'No';

//For compare the ending string with case insensitive. 
if(stripos(strrev($content), strrev($search)) === 0) echo 'Yes';
else echo 'No';

//For compare the ending string with case sensitive. 
if(strpos(strrev($content), strrev($search)) === 0) echo 'Yes';
else echo 'No';

Answer 6

Don't know if this is fast or not but for a single character test, these work, too:

(array_pop(str_split($string)) === $test) ? true : false;
($string[strlen($string)-1] === $test) ? true : false;
(strrev($string)[0] === $test) ? true : false;